Control valve for fluid-operated systems



Aug. 7, 1945. c. w. MOTT 2,381,553

CONTROL VALVE FOR FLUID-OPERATED SYSTEMS 7 Filed Aug. 30, 1943 57 7.5 fla /6721 02:

- bers upon their seats.

Patented Aug. 7, 1945 I CONTROL VALVE FORIFLUID-OPERATED SYSTEMS Carl W. Mott, La Grange, Ill., asslgnor to International Harvester Company, a corporation of New Jersey.

Application August 30, 1943, Serial No. 500,502

2 Claims.

This invention has to do with a valve employing successively openable elements.

A general object of the'invention is the pro-- vision of a novel compact valve arrangement in which there is a principal valve member openable against pressure and an auxiliary valve member first openable to diminish the pressure and g consequently the force necessary to open the body or casing in which there are adjacent channels containing seats for valve members and an annular recess intersecting said channels to confine a spring for pressing each of the valve mem- These and other desirable objects inherent in and encompassed by the invention will be more fully understood after reading the ensuing de scription with reference to the annexed drawing, wherein:

Fig. 1 is a sectional view taken axially through a form of valve embodying the principles of this invention; and

Fig. 2 is an end view 01' a channelled block employed in the Fig. l embodiment and taken on the line I of Fig. 1.-

With continued reference to the drawing the preferred embodiment therein shown comprises a chamber H formed by a recess 12 in a plate", a hole 14, a plate It, bores I8 and 'Il ina block 18, and a recess 18 in a block 8i. The block 18 is seated in a countersunk portion 82 of the recess 18.

The primary valve in this embodiment comprises a spherical valve member 88 seatable upon a seat 84 at the upper end of the bore 11. The auxiliary valve comprises a spherical valve member 88 seatable upon a seat 88 at the upper end of the bore 18. These two valve members 83 and 88 are normally pressed against their valve seats by an helical spring 81. which reacts against the bottom of the recess 12 and against ring 88, which is interposed between the upper end of the spring and said valve members.

Said ring .88 and the upper end portion of the spring 81 are contained in part within arcuate recess portions 88 and 9!, which are described or generated about a point P between the axes of the bores 18 and I1, and the radius of generation is such that the pitch line PL intersects the axes of said bores. Th valve seats 84 and 88 are so spaced axially oiv the bores that the spherical valve members 88 and 85, while resting upon the seats, contact the ring 88 while this ring is disposed within a plane perpendicular to the bore axes.

Means for unseating the valve members comprises pins 92 and 83 having shank portions anchored within a small plate 84, which is movable axially within the discharge portion I9 of the valve chamber. A valve stem 85, when pushed downwardly against the plate 95, will first cause the pin 93 to engage and unseat the auxiliary valve member with the same effect as hereinabove with respect to the auxiliary valve member 29. Further, downward displacement of the valve stem 85 will cause the pin 82 to engage and unseat the principal valve member 83. Fluid under pressure introduced into the valve chamber H below the valve members 83 and 85 will then be permitted to escape upwardly over the valve seats into the discharge portion 19 of the valve cham be understood that the invention extends to other embodiments, forms, modifications, structures, and details falling within the scope and spirit thereof and not sacrificing all of its material advantages.

What is claimed is: I

1. In a valve, a chamber having bores with parallel axes and each bore having a valve seat over which fluid is escapable when the seat is uncovered, the side walls of said chamber having arcuate recesses generated about an axis between'and parallel with those of the bores and of a radius to cause the pitch line of said recesses to substantially intersect the bore axes, valve members respectively for said seats, and a helical spring disposed mutually in said bores and said recesses .to yieldably urge both -of the valve members against their seats.

2. In a valve, a valve chamber having a fluid discharge passage means and bores with parallel axes and each bore having a valve seat over which iluid is escapable when the seat is uncovered, the

side walls of said chamber having arcuate recesses enerated about an axis between and parallel with those 01 the bores and of a' radius to cause the 

